
#include <iostream>
#include <string>
using namespace std;

int main()
{
    string s1, s;
    cin >> s;
    
    for(char c : s){
        if(c == '(') s1+=c;
        if(c==')'){
        if (s1.length()>0){
            if(s1[s1.length()-1] == '(') s1.pop_back();
        }
        }
    if(c == '<') s1+=c;
        if(c=='>'){
        if (s1.length()>0){
            if(s1[s1.length()-1] == '<') s1.pop_back();
        }
        }
    if(c == '[') s1+=c;
        if(c==']'){
        if (s1.length()>0){
            if(s1[s1.length()-1] == '[') s1.pop_back();
        }
        }
    if(c == '{') s1+=c;
        if(c=='}'){
        if (s1.length()>0){
            if(s1[s1.length()-1] == '{') s1.pop_back();
        }
        }
    }
    if (s1.length() == 0) cout << "Верная";
    else cout << "Неверная";

    return 0;
}
